package com.aaron.map;

import java.util.HashMap;

/**
 * @author liurong
 * @date 2021/9/5 22:32
 * @version:
 */
public class HashMapDemo {

    public static void main(String[] args) {
        new Object();
        HashMap map = new HashMap();
        map.put("xx","xx");
        int h = -1;
        System.out.println(Integer.toHexString(h >>> 16));


    }

}

